TSB190209-120320

Service Bulletin Details

Public Details for: TSB190209-120320

This technical service bulletin describes the verification and resolution of the misdiagnosis of fuel rail pressure sensor fault codes or replacement of the entire engine wiring harness.


- 9999 -

Models from 9999
9999 CUMMINS L9 
12/9/2019
Engine Wire Harness Troubleshooting for Fuel Rail Pressure Sensor Circuit
Technical Service Bulletin
Technical Service Bulletin: TSB190209
Released Date: 03-Dec-2019
Engine Wire Harness Troubleshooting for Fuel Rail Pressure Sensor Circuit
Engine Wire Harness Troubleshooting for Fuel Rail
Pressure Sensor Circuit
Warranty Statement
The information in this document has no effect on present warranty coverage or repair practices,
nor does it authorize TRP or Campaign actions.
Contents
Product Affected
ISL9 CM2350 L101
L9 CM2350 L116B
L9 CM2350 L123B
Issue
Symptom:
Troubleshooting of fuel rail pressure sensor fault codes can lead to misdiagnosis of the fuel
rail pressure sensor or replacement of entire engine wiring harness.
Active or inactive counts of Fault Codes 755, 4727, and or 451, 452, 483, and or 484.
Root Cause:
Damaged wiring at or near the fuel rail pressure sensor engine wire harness connector.
See Figures 1 and 2 below.
Verification
If Troubleshooting directs replacement of fuel rail pressure sensor or engine wiring harness,
perform thorough inspection of wiring going to fuel rail pressure sensor connector. See Figure
1 below. See corresponding Service Manual. Reference Procedures 019-361 and 019-362 in
Section 19. Note that the wire can be broken but the insulation still intact.
Resolution
If damage to fuel rail pressure sensor wiring is found, repair with electrical repair connector or
electrical repair connector terminal. See corresponding Service Manual. Reference Procedure
019-199 in Section 19.
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Engine Wire Harness Troubleshooting for Fuel Rail Pressure Sensor Circuit
Part Identification
Figure 1, Wiring near the Fuel Rail Pressure Sensor Engine Wire Harness Connector.
Figure 2, Example of Damaged Wiring.
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Engine Wire Harness Troubleshooting for Fuel Rail Pressure Sensor Circuit
Document History
Date
2019-11-26
Details
Module Created
Last Modified: 03-Dec-2019
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